TP960.481

POWER SUPPLY■

Compact width: Only 79 mm■

Efficiency 97 % at 48 V, 20 A■

Power losses at no load: 2.8 W■

Dynamic BonusPower management:
Max. 1920 W for up to 15 s and 1152 W continuous(up to +45 °C)
Enhanced HiccupPLUS protects connected systems andpower supply from overload
Remote control of output voltage■■■

AC-OK and DC-OK relay contacts■

Active current share bus for constant output voltage inparallel use
Output voltage adjustable in six steps■■

PRODUCT DESCRIPTION

3AC 48 V, 960 W

LED bar for visual monitoring the output power

SHORT-FORM DATAThe TP960 series is the top of the line for 3-phasepower supplies for DIN rails from PULS. Size, efficiency,
and extra power capabilities have been even further
improved significantly compared to the renown
DIMENSION-Series.
PULS BonusPower enables the use with highly
dynamic loads with large power requirements, such as
drives.
The LED bar provides direct information on the output
power load of connected consumers.
The no inrush current peak design lowers the effort inselecting connected system components.
The device is very robust in terms of back-feeding
events and thus helps to avoid downtimes. The
HiccupPLUS mode makes installation and operation safeand reliable.
The DC-OK and AC-OK relay contacts enable remotediagnostics.

Output voltage
DC 48 V
Adjustment range 48 - 56 Vdc

nominalsix step adjustablesettings
Output current
24 - 20.6 A
up to +45 °C
20 - 17.1 A
up to +60 °C
18.3 - 15.7 A
at +70 °C
short term (15 s)
40 A
up to +45 °C
Derating
linearly 12.8 W/K +45 °C to +60 °C
linearly 8 W/K+60 °C to +70 °C
Input voltage AC
3AC 380 - 500 V -15 / +10 %Input current AC
1.51 / 1.22 A
at 3x 400 / 500 Vac
Power factor
0.91 / 0.94
at 3x 400 / 500 Vac
Inrush current AC no inrush peak
Efficiency
97 / 97 %at 3x 400 / 500 Vac
Power losses
32 / 32 W
at 3x 400 / 500 Vac
Hold-up time
29 / 29 ms
at 3x 400 / 500 Vac
Temperature range -40 °C to +70 °C
Size (w x h x d)
79x124x136 mm without DIN rail
Weight1100 g

The quick connector push-in clamps can be used for
all types of wires, stranded with / without ferrules
and solid wire, and enable quick installation. The
approval package makes this device fit to a variety of
applications.

ORDER NUMBERS
Power Supply

TP960.481

MAIN APPROVALS
For details and the complete approval list, see chapter 25.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

Index
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Intended Use............................................................
Installation Instructions...........................................
AC Input....................................................................
External Input Protection........................................
DC Input....................................................................
Input Inrush Current................................................
Output.......................................................................
Hold-up Time............................................................
DC-OK Relay Contact...............................................
AC-OK Relay Contact...............................................
Current Share Bus....................................................
Internal Data Logging.............................................
Efficiency and Power Losses....................................
Lifetime Expectancy.................................................
MTBF.........................................................................

3
3
4
5
5
5
6
9
10
11
12
12
13
14
14

16
17
18
19
20
21
22
23
24
25
26
27
28

Functional Diagram.................................................
Terminals and Wiring..............................................
Front Side and User Elements.................................
Status LED Signaling................................................
EMC...........................................................................
Environment.............................................................
Protection Features..................................................
Safety Features.........................................................
Dielectric Strength...................................................
Approved, Fulfilled or Tested Standards................
Regulatory Product Compliance.............................
Physical Dimensions and Weight............................
Deviation List............................................................

15
16
17
17
18
19
20
20
21
22
22
23
24

The information given in this document is correct to the best of our knowledge and experience at the time of publication.
If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of the word. As thestate of our knowledge and experience is constantly changing, the information in this data sheet is subject to revision. We
therefore kindly ask you to always use the latest issue of this document (available under www.pulspower.com).
No part of this document may be reproduced or utilised in any form without our prior permission in writing.
Packaging and packaging aids can and should always be recycled. The product itself may not be disposed of as domestic
refuse.

Terminology and Abbreviation
PE andSymbolEarth, Groundt.b.d.
3AC 500 V

3x 500 Vac
50 Hz vs. 60 Hz
may
shall
shouldPE is the abbreviation for Protective Earth and has the same meaning as the symbol.
This document uses the term “earth” which is the same as the U.S. term “ground”.
To be defined, value or description will follow later.
A figure displayed with the AC or DC before the value represents a nominal voltage with standard
tolerances (usually ±15 %) included.
E.g.: DC 12 V describes a 12 V battery disregarding whether it is full (13.7 V) or flat (10 V)
A figure with the unit (Vac) at the end is a momentary figure without any additional tolerances
included.
As long as not otherwise stated, AC 380 V and AC 500 V parameters are valid at 50 Hz mains
frequency. AC 500 V parameters are valid for 60 Hz mains frequency.
A key word indicating flexibility of choice with no implied preference.
A key word indicating a mandatory requirement.
A key word indicating flexibility of choice with a strongly preferred implementation.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

1.

Intended Use

This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control,
process control, monitoring and measurement equipment or the like.
Do not use this device in equipment where malfunction may cause severe personal injury or threaten human life.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.

2.

Installation Instructions
DANGER–––––

Risk of electrical shock, fire, personal injury or death.

Turn power off before working on the device. Protect against inadvertent re-powering.
Do not open, modify or repair the device.
Use caution to prevent any foreign objects from entering the housing.
Do not use in wet locations or in areas where moisture or condensation can be expected.
Do not touch during power-on, and immediately after power-off. Hot surfaces may cause burns.

Obey the following installation instructions:This device may only be installed and put into operation by qualified personnel. This device does not contain serviceableparts. The tripping of an internal fuse is caused by an internal defect. If damage or malfunction should occur during
installation or operation, immediately turn power off and send unit to the factory for inspection.
Install device in an enclosure providing protection against electrical, mechanical and fire hazards. Install the device onto a
DIN rail according to EN 60715 with the input terminals on the bottom of the device. Other mounting orientations requirea reduction in output current.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper cables that aredesigned for a minimum operating temperature of +60 °C for ambient temperatures up to +45 °C, +75 °C for ambient
temperatures up to +60 °C and +90 °C for ambient temperatures up to +70 °C. Ensure that all strands of a stranded wire
enter the terminal connection.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed. The
enclosure of the device provides a degree of protection of IP20.
The isolation of the device is designed to withstand impulse voltages of overvoltage category III according to IEC 60664-1.
For TN-, TT-mains systems with earthed neutral and IT star mains systems with insulation monitoring the device is designed
for overvoltage category III zones up to 2000 m and for overvoltage category II zones up to 5000 m. For TN-, TT-, IT-deltamains systems or IT star mains systems without insulation monitoring the device is intended for overvoltage category II
zones up to 2000 m.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do notcover ventilation grid!
The device is designed for altitudes up to 5000 m. See additional requirements in the product datasheet for use above
2000 m.
Keep the following minimum installation clearances: 40 mm on top and bottom, 5 mm left and right side. Increase the 5
mm to 15 mm in case the adjacent device is a heat source. When the device is permanently loaded with less than 50 %,the 5 mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 32 A (IEC) and 30 A (UL) without additional protection
device. If an external fuse is utilized, do not use circuit breakers smaller than 16 A B- or C-Characteristic to avoid a nuisancetripping of the circuit breaker.
The maximum surrounding air temperature is +70 °C. The operational temperature is the same as the ambient or
surrounding air temperature and is defined 3 cm below the device.
The device is designed to operate in areas between 5 % and 95 % relative humidity.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

3.

AC Input

The device is suitable to be supplied from TN-, TT-, IT- or corner grounded delta mains networks with AC voltage.
AC input
AC input rangenom.

3AC 380-500 Vac
3x 323-550 Vac

Input to PE

max.

550 Vacaccording to IEC 62103

Input frequency

nom.

50-60 Hz

±6%

Turn-on voltage
Shut-down voltage

typ.
typ.

3x 305 Vac
3x 275 Vacsteady-state value, see Fig. 3-1
steady-state value at 20 A load, see Fig. 3-1

External input protection

see recommendations in chapter 4
3AC 400 V

3AC 500 V

Input current

typ.

1.51 A

1.22 A

at 48 V, 20 A, see Fig. 3-3

1)

Power factor

typ.

0.91

0.94

at 48 V, 20 A, see Fig. 3-4

Start-up delay
Rise time

typ.
typ.

1000 ms
20 ms1000 ms
20 ms

typ.

33 ms

33 ms

see Fig. 3-2
at 48 V, 20 A const. current load, 0 mF load
capacitance, see Fig. 3-2
at 48 V, 20 A const. current load, 40 mF load
capacitance, see Fig. 3-2

max.

500 mV

500 mV

Turn-on overshoot1)

see Fig. 3-2

The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit.

Fig. 3-1: Input voltage range

Fig. 3-2: Turn-on behavior, definitions

Fig. 3-3: Input current vs. output
current at 48 V output voltage

Fig. 3-4: Power factor vs. output
current at 48 V output voltage

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

4.

External Input Protection

DANGER
Input fuse is not implemented!
Make sure to use an appropriate external input protection for the suitable mains voltage on each phase.
Choose one of the following options:
Rated Current

Circuit Breaker Characteristics
B
✓
✓
✓
✓
✓

6A
10 A
13 A
16 A
20 A

C
✓
✓
✓
✓
✓

D
✓
✓
✓
✓
✓

NOTE
Neozed fuse, power switch or equivalent fuses not yet tested. Consult PULS for further suitable devices.

5.

DC Input

Do not operate this power supply with DC input voltage.

6.

Input Inrush Current

The inrush current is the maximum input current that flows in an instant after the power supply is switched on. This current
is greater than the normal or operating current of the power supply. To prevent fuses or circuit breakers from tripping andensure a stable operation, the inrush current has to be limited.
The power supply has a control circuit that actively reduces the current to a level much lower than the steady-state
input current. Therefore it has no inrush current peak. The current that charges the EMI (electromagnetic interference)
suppression capacitors is ignored in the first few microseconds after switching on.
The power supply is equipped with an active inrush current limitation circuit, which limits the input inrush current afterturn-on to a low value. The input current is usually smaller than the steady-state input current.

Fig. 6-1: Typical turn-on behaviour
at nominal load and +25 °C ambient

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.4817.

OutputOutput voltage

nom.

Adjustment range

48 Vdc48-56 Vdetent potentiometer with 6 settings
48 V, 50 V, 52 V, 54 V, 55 V, 56 V

Factory settings

max.
typ.

56 V
48 V

± 0.2 % using current share bus

Line regulation
Load regulation

max.
max.

10 mV
50 mV

between 3x 323 Vac and 550 Vac
between 0 A and 24 A, static value, see Fig. 7-1

Ripple and noise voltagemax.

50 mVpp

at 20 Hz to 20 MHz, 50 Ohm

Output current

nom.
20 A
at 48 V and up to +60 °C ambient temperaturenom.
18.3 A
at 48 V and up to +70 °C ambient temperaturenom.
17.1 A
at 56 V and up to +60 °C ambient temperaturenom.
15.7 A
at 56 V and up to +70 °C ambient temperature
Derate linearly between +60 °C and +70 °C, see Fig. 21-1

BonusPower continuous1)

nom.
24 A
at 48 V and up to +45 °C ambient temperaturenom.
20.6 A
at 56 V and up to +45 °C ambient temperature
BonusPower continuous decreases linearly to nominal power between +45 °C and +60 °C,
see Fig. 21-1

Output power
BonusPower continuous1)
BonusPower short term2)

nom.

960 W
1152 W
1920 W

continuously available
at 48 V, 24 A, up to +45 °C, continuous
at 48 V, 40 A, up to +40 °C for short term 15 s or +60 °C for
short term 5 s

Fuse breaking current

typ.

100 A

Up to 12 ms once every 5 s, see Fig. 7-2. The fuse breaking
current is an enhanced transient current which helps to trip
fuses on faulty output branches. The output voltage stays
above 40 V.

Overload behaviour

Continuous current
HiccupPLUS mode3)

Overload /short-circuit current

for output voltage above 20 Vdc
for output voltage below 20 Vdc

40 A

Discharge current of output capacitors is not included.

Output capacitancenom.

6 220 μF

included inside the power supply

Back-feeding loads

max.

60 V / 3.5 J

The unit is resistant and does not show malfunctioning
when a load feeds back voltage to the power supply. It
does not matter whether the power supply is on or off. The
absorbing energy can be calculated according to the built-in
large sized output capacitor.

1)

BonusPower continuous:This power / current is continuously allowed up to an ambient temperature of +45 °C. Above +45 °C, do not use this power or current longer
than a duty cycle of 10 % and / or not longer than 1 minute every 10 minutes.

2)

BonusPower short term:
The power supply is designed to support loads with a higher short-term power requirement without damage or shutdown.
The short-term duration is hardware controlled by an output power manager. This power is repeatedly available.

3)

HiccupPLUS mode:
At heavy overloads (when output voltage falls below 20 V), the power supply delivers continuous output current for 2 s. After this, the output
is switched off for approx. 8 s before a new start attempt is automatically performed. This cycle is repeated as long as the overload exists. If theoverload has been cleared, the device will operate normally, see Fig. 7-3.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

Adjustment Range
56

A

48

56

B

Adjustment Range

48

40

40

32

A

BonusPower
continuous

B

BonusPower
short-term (15s)

24
16
8

A

32

B

24
16
8

0

0
0

5

10

15

20

25
30
35
40
Output Current (A)0Fig. 7-1: Output voltage vs. output current, typ.

20

60
80
100
Output Current (A)40

Fig. 7-2: Dynamic overcurrent capability, typ.

Hiccup state
40A
24A

t

0
2s

8s

2s

8s

2s

8s

2s

Fig. 7-3: Short-circuit on output, HiccupPLUS mode, typ.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

Dynamic BonusPower Management
The power supply continuously monitors the power output through a power-time-integral. Therefore, BonusPower may
be available longer than the maximum specified time if less BonusPower is utilised than the maximum allowed.
BonusPower utilised
110 %
120 %
130 %
140 %
150 %
160 %
170 %
180 %
190 %
200 %

Time BonusPower isavailable (s)
71
34
22
16
12
10
8
7
6
5

80
70
60
50
40
30
20
10
0
0 100

150

200
BonusPower (%)

Fig. 1: Calculated time availabilityof BonusPower up to +60 °C

After operating at BonusPower, the power supply needs a cool-down period or recovery time. This can be calculated
depending on the base load (<100 %) following the BonusPower period.

trecover =P2BonusPower used - P2nominal power
P2nominal power - P2base load

x tBonusPower used

Example:Examples of recovery time after maximum BonusPower of 150 % was utilised for up to 5 seconds are displayed in thefollowing table:

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

for 150 % BonusPower
BonusPower time (s)Base load

1
1
1
1
1
1
2
2
2
3
7

0%
10%
20%
30%
40%
50%
60%
70%
80%
90%

2
3
3
3
3
3
3
4
5
7
13

3
4
4
4
4
4
5
6
7
10
20

4
5
5
5
5
6
7
8
10
14
26

5
6
6
7
7
7
8
10
12
17
33

4
12
12
13
13
14
16
19
24
33
63

5
15
15
16
16
18
20
23
29
42
79

Recovery time (s)for 200 % BonusPower
BonusPower time (s)Base load

1
3
3
3
3
4
4
5
6
8
16

0%
10%
20%
30%
40%
50%
60%
70%
80%
90%

8.

2
6
6
6
7
7
8
9
12
17
32

3
9
9
9
10
11
12
14
18
25
47

Recovery time (s)Hold-up TimeThe hold-up time is the time during which a power supply’s output voltage remains within specification following the lossof input power. The hold-up time is output load dependent. At no load, the hold-up time can be up to several seconds.
The green DC-OK LED is also on during the hold-up time.

Hold-up time

typ.
min.
typ.
min.

3AC 400 V

3AC 500 V

55 ms
50 ms
29 ms
20 ms

55 ms
50 ms
29 ms
20 ms

at 48 V, 10 A, see Fig. 8-1
at 48 V, 10 A, see Fig. 8-1
at 48 V, 20 A, see Fig. 8-1
at 48 V, 20 A, see Fig. 8-1

Fig. 8-1: Hold-up time vs. input voltage

Fig. 8-2: Shut-down behaviour

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

9.

DC-OK Relay Contact

This feature monitors the output voltage, which is produced by the power supply itself. It is independent of a back-fed
voltage from a unit connected in parallel to the power supply output.
Contact closes

As soon as the output voltage reaches typ. 90 % of the adjusted output voltage level.

Contact opens

As soon as the output voltage dips more than 10 % below the adjusted output voltage.
Short dips will be extended to a signal length of 100 ms. Dips shorter than 1 ms will be ignored.

Switching hysteresis

typ. 2 V

Contact ratings

maximum 60 Vdc 0.3 A, resistive load
minimum permissible load: 1 mA at 5 Vdc

Isolation voltage

see chapter chapter 24, dielectric strength table

Fig. 9-1: DC-OK relay contact behaviour

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

10. AC-OK Relay Contact
The AC-OK relay signalises the status of the AC mains voltage at the input terminal. It is synchronised with the status LED.
Contact closes

Contact opens

Contact latches open

As soon as all three line-to-line AC input voltages enter the rated input range, unless it islatched open.
The latch condition is reset by disconnecting the power supply from AC and waiting until status
LED changes from red to off (delay of typ. 800 ms after startup and 100 ms otherwise).
Either as soon as one or more line-to-line AC input voltages exits the rated input range due toundervoltage or overvoltage (delay of typ. 50 ms), or the difference of two line-to-line voltages
becomes greater than 40 Vrms due to assymetry (delay of typ. 500 ms).
Short excursions are extended to a signal length of 100 ms (contact opened).
Due to dynamic overvoltage, after 6 events within the last 60 minutes or 3 events within the last
5 minutes.
The event counter is incremented also for short surges of high amplitude.

Switching hysteresis

25 V for undervoltage, 15 V for overvoltage, 20 V for asymmetry

Contact ratings

maximum 60 Vdc 0.3 A, resistive load
minimum permissible load: 1 mA at 5 Vdc

Isolation voltage

see chapter chapter 24, dielectric strength tablerms
L1-L2, L1-L3, L2-L3

550V

eg. L1-L2

40V
323V

L1-L3, L2-L3

20V

500ms

100ms <50ms nd

2)
1)

0V
800ms

50ms

100ms
<50ms

open
closed50ms 100ms<5min => latch

Fig. 10-1: AC-OK relay contact behavior

1)

At least 1 line-line voltage below low range minus hysteresis2)

All 3 line-line voltages above low range limitnd

not defined

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

11. Current Share Bus
The current share bus distributes the current evenly for power supplies operating in parallel. It functions as an active currentsharing system, providing the advantage of maintaining a constant output voltage, regardless of the connected load.
To enable parallel operation, the bus-pins of each unit (pin 4.5 and 4.6) need to be daisy-chained, with the power returnpins serving as the return path for the signal. This feature is especially beneficial for maintaining stable and consistent
power output in parallel power supply configurations.
Make sure to adjust the output voltage potentiometer to the same values.
For detailed wiring, see chapter 17.

12. Internal Data Logging
A microcontroller inside the power supply acquires and stores operating data during the lifetime of the unit. The data can be
retrieved by the PULS service and repair personnel, even when the unit is defect. The data allows for better troubleshooting
in case of failure.
■
■
■

■

Acquired data:
Family name of unit (TP960), revision of firmware
Device configuration (such as output voltage setpoint, calibration data, etc.)
Operational data:– Operating hours and remaining portion of lifetime– Maximum and minimum temperatures of semiconductors, capacitors and microcontrollers (values and counters)– Overtemperature event (counter)– Output voltage (min, max, value)– Output current (min, max, value)– Input voltage (rms min and max, value)– Input voltage (peak, max value)– Input voltage asymmetry (rms max, value and counter)– Input overvoltage events (individual line-to-line rms and transient, counters)– Input undervoltage sags (counter)– Input voltage line-to-line phase fail (counters)– Stress level (maximum, value and counter)
Number of turn-on sequences

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

13. Efficiency and Power Losses
3AC 400 V

3AC 500 V

typ.
typ.

97 %
96.8 %

97 %96.8 %

at 48 V, 20 A
at 48 V, 24 A (BonusPower continuous)

Average efficiency1)

typ.

96.8 %

96.5 %

25 % at 5 A, 25 % at 10 A,
25 % at 15 A, 25 % at 20 A

Power losses

typ.
typ.
typ.
typ.

2.8 W
8W
32 W
37 W

1.5 W
11 W
32 W
37 W

at 48 V, 0 A
at 48 V, 10 A
at 48 V, 20 A
at 48 V, 24 A (BonusPower continuous)

1)

The average efficiency is an assumption for a typical application where the power supply is loaded with 25 % of the nominal load for 25 %of the time, 50 % of the nominal load for another 25 % of the time, 75 % of the nominal load for another 25 % of the time and with 100 %of the nominal load for the rest of the time.

Fig. 13-1: Efficiency vs. output current at 48 V, typ.

Fig. 13-2: Losses vs. output current at 48 V, typ.

Fig. 13-3: Efficiency vs. input
voltage at 48 V, 20 A, typ.

Fig. 13-4: Losses vs. input voltage at 48 V, 20 A, typ.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

14. Lifetime Expectancy
The lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by
the lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is
calculated according to the capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only
guarantees a maximum life of up to 15 years (131 400 h). Any number exceeding this value is a calculated theoretical
lifetime, which can be used to compare devices.

Lifetime expectancy

3AC 400 V

3AC 500 V

197 000 h
675 000 h
122 000 h
486 000 h
61 000 h
243 000 h

202 000 h
689 000 h
123 000 h
489 000 h
63 000 h
247 000 h

at 48 V, 10 A and +40 °C
at 48 V, 10 A and +25 °C
at 48 V, 20 A and +40 °C
at 48 V, 20 A and +25 °C
at 48 V, 24 A and +40 °C
at 48 V, 24 A and +25 °C

15. MTBF
MTBF stands for Mean Time Between Failures, which is calculated according to statistical device failures, and indicatesreliability of a device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent
the lifetime of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. An MTBF figure of e.g. 1 000 000 h meansthat statistically one unit out of 10 000 installed units will fail every 100 h. However, it can not be determined if the failed
unit has been running for 50 000 h or only for 100 h.
For these types of units the MTTF (Mean Time To Failures) value is the same value as the MTBF value.
3AC 400 V

3AC 500 V

MTBF SN 29500, IEC 61709

342 000 h
753 000 h

325 000 h
721 000 h

at 48 V, 20 A and +40 °C
at 48 V, 20 A and +25 °C

MTBF MIL HDBK 217F

209 000 h
284 000 h
45 000 h
59 000 h

202 000 h
271 000 h
43 000 h
58 000 h

at 48 V, 20 A and +40 °C; Ground Benign GB40
at 48 V, 20 A and +25 °C; Ground Benign GB25
at 48 V, 20 A and +40 °C; Ground Fixed GF40
at 48 V, 20 A and +25 °C; Ground Fixed GF25

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

16. Functional Diagram

Fig. 16-1: Functional Diagram TP960.481

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

17. Terminals and Wiring
The terminals are IP20 finger safe constructed and suitable for field- and factory wiring.

Type

Solid wire
Stranded wire
American wire gauge
Max. wire diameter (including
ferrules)Wire stripping length

Input terminals
Quick-connect springclamp terminals + Push-infunctionality
max. 6 mm2
max. 6 mm2
AWG 24-10
2.8 mmOutput terminals
Quick-connect springclamp terminals + Push-infunctionality
max. 16 mm2
max. 16 mm2
AWG 20-10
4.5 mmSignal terminals
Push-in terminals

14 mm

18 mm

8 mm

max. 1.5 mm2
max. 1.5 mm2
AWG 28-14
1.5 mmInstructions for wirings:a) Use appropriate copper cables that are designed for minimum operating temperatures of:+60 °C for ambient up to +45 °C and+75 °C for ambient up to +60 °C minimum+90 °C for ambient up to +70 °C minimum.
b) Follow national installation codes and installation regulations!
c) Ensure that all strands of a stranded wire enter the terminal connection!
d) Do not use the unit without PE connection.
e) Unused terminal compartments should be securely tightened.
f) Ferrules are allowed.
Daisy chaining power path and current share bus:
The power supplies can operate in parallel to distribute the current evenly. This means that each power supply provides
the same amount of current to the load. The current share bus has the advantage of keeping the output voltage constant,no matter how much load is connected.
When power supplies are connected in parallel, the share bus pins need to be daisy chained. Daisy chaining (parallelingpower supplies by jumping from one power supply output to the next) is allowed as long as the average output current
through one terminal pin does not exceed 51 A.
To enable parallel operation:
 Adjust the output voltage potentiometer of each unit to the same value. The current-sharing system can compensate
up to 0.4 V voltage difference, but it is better to have them as close as possible.
 Connect the bus-pins of each unit (pin 4.5 and 4.6) with a wire. This creates an active current-sharing system thatbalances the current among the power supplies. The power return pins (pin 3.3 or 3.4) serve as the return path for thecurrent-sharing signal.
If the current is higher, use a separate distribution terminal block as shown in Fig. 17-2.

Fig. 17-2: Using distribution terminals

Fig. 17-1: Daisy chaining of outputs

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

18. Front Side and User Elements
A

H

Line input
PE (Protective Earth) input

B

Output terminals
Identical poles are internally connected.
3.1(+)
Positive output
3.2
(+)
3.3
(−)
Negative output (return)
3.4
(−)

F
G

C

Output voltage potentiometer
Factory setting: 48 V

D

Status LED
Green, when the output voltage is > 90 % of the adjusted
output voltage.

B

E

DC-OK relay contact
4.1
Open /
4.2
close
contact

The DC-OK relay monitors the output
voltage. When the contact is closed, the
DC-OK LED is on.

AF

AC-OK relay contact
4.3Open /
4.4
close
contact

The AC-OK relay monitors the AC input
voltage. In case of failure, the status LED
turns yellow.

D
CE

Fig. 18-1: Front side

Input terminals
1.2
L1
1.3
L2
1.4
L3
2.1

G

Current share bus
4.5
The current share bus distributes the current evenly
4.6
for power supplies operating in parallel.

H

LED bar

19. Status LED Signaling
The status LED (D) displays different running conditions of the PSU in real-time.
Green
DC-OK is above 90 % of output voltage. All outputs are operating according to their
settings.
Yellow (steady on)
Various input voltage failures
Yellow (blinking 1 Hz)
Pre-warning for overtemperature
Red (steady on)
AC input drop below the specified voltage, the output voltage turns off
Red (blinking 1 Hz)
HiccupPLUS mode or overtemp protection
Off
DC-OK is below 90 % or power supply is not powered.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

20. EMCThe device is suitable for applications in industrial environments as well as in residential, commercial and light industry
environments. All results assume a 3-phase operation of the device.
EMC Immunity

According to generic standards: EN IEC 61000-6-1 and EN IEC 61000-6-2

Electrostatic discharge

EN 61000-4-2

contact discharge
air discharge

8 kV
15 kV

Criterion A
Criterion A

Electromagnetic RF field

EN 61000-4-3

80 MHz - 2.7 GHz
2.7 GHz - 6 GHz

10 V/mt.b.d.

Criterion A
Criterion t.b.d.

Fast transients (Burst)

EN 61000-4-4

input lines
output lines
DC-OK signal (coupling clamp)

4 kV
2 kV
2 kV

Criterion A
Criterion A
Criterion A

Surge voltage on input

EN 61000-4-5

L1 → L2, L2 → L3, L1 → L3
L1 / L2 / L3 → PE

2 kV
4 kV

Criterion A
Criterion A

Surge voltage on output

EN 61000-4-5(+) → (−)(+) / (−) → PE

1 kV
1 kV

Criterion A
Criterion A

Surge voltage on DC-OK

EN 61000-4-5

DC-OK signal → PE

1 kV

Criterion A

Conducted disturbanceEN 61000-4-6

0.15 - 80 MHz

20 V

Criterion A

Mains voltage dips

EN 61000-4-11

0 % of 380 Vac (0 Vac)
0 % of 500 Vac (0 Vac)
40 % of 380 Vac (152 Vac)
40 % of 500 Vac (200 Vac)
70 % of 380 Vac (266 Vac)
70 % of 500 Vac (350 Vac)

1 cycle1 cycle200 ms200 ms
500 ms
500 msCriterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A

Voltage interruptions

EN 61000-4-11

0 Vac

5000 ms

Criterion C

Voltage sags

SEMI F47 0706

dips on two phases according to section 7.2. of the SEMI F47 standard
80 % of 380 Vac (304 Vac)
1000 ms
Criterion A
70 % of 380 Vac (266 Vac)
500 msCriterion A
50 % of 380 Vac (160 Vac)
200 msCriterion A

Powerful transients

VDE 0160

over entire load range

1550 V, 1.3 ms

Criterion A

Performance criterions:A:

Power supply shows normal operation behavior within the defined limits.

C:

Temporary loss of function is possible. Power supply may shut-down and restarts by itself. No damage or hazards for the power supply will occur.

EMC Emission

According to generic standards: EN IEC 61000-6-3, EN IEC 61000-6-8 and EN IEC
61000-6-4

Conducted emission input lines

Class B

Conducted emission output lines

EN 55011, EN 55032, FCC Part 15, CISPR 11,
CISPR 32
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1

Radiated emission

EN 55011, EN 55032

Class B

Harmonic input current

EN 61000-3-2

fulfilled for Class A equipment

Voltage fluctuations, flicker1)

EN 61000-3-3

fulfilled with constant current loads,
non pulsing

Limits for DC power ports according to
EN 61000-6-8 are fulfilled.

This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) thisdevice must accept any interference received, including interference that may cause undesired operation.
1)

Tested with constant current loads, non pulsing

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

Switching Frequencies

The power supply has three converters with three different switching frequencies
included. One is nearly constant. The others are variable.

PFC converter
Main converter
Auxiliary converter
Microcontroller clock

20 kHz to 200 kHz
60 kHz to 140 kHz
54-66 kHz
64 MHzinput voltage and output load dependent
output load dependent

Operational temperature1)
Storage temperature-40 °C to +70 °C-40 °C to +80 °C

reduce output power according to Fig. 21-1
for storage and transportation

Output derating

12.8 W/°C
between +45 °C and +60 °C
8 W/°Cbetween +60 °C and +70 °C
60 W / 1000 m orfor altitudes > 2000 m, see Fig. 21-2
5 °C / 1000 m
The derating is not hardware controlled. The user has to take care by himself to stay
below the derated current limits in order not to overload the unit.

Humidity

5 - 95% r.h.

according to IEC 60068-2-30
Do not energize while condensation is present.

Atmospheric pressure

54 - 110 kPa

for details, see Fig. 21-2

Altitude

0 to 2000 m
2000 to 6000 m

without any restrictions
reduce output power or ambient temperature, seeFig. 21-2.

Over-voltage category

III
II

IEC/UL 61010-2-201 up to 2000 m
IEC/UL 61010-2-201 2000 m to 6000 m

Degree of pollution

2

IEC/UL 61010-2-201, not conductive

Vibration sinusoidal

2 - 17.8 Hz: ±1.6 mm;
IEC 60068-2-6
17.8 - 500 Hz: 2 g
2 hours / axis
15 g 6 ms, 10 g 11 ms
IEC 60068-2-27
3 bumps / direction, 18 bumps
in total
Shock and vibration is tested in combination with DIN rails EN 60715 with a heightof 15 mm and a thickness of 1.3 mm and standard orientation.
Some audible noise may be emitted from the power supply during no load,
overload or short circuit.

21. Environment

Shock

Audible noise1)

The operational temperature is the same as the ambient or surrounding temperature. It is defined as the air temperature 3 cm below the device.

Allowed Output Current at 48 V (A)Allowed Output Current (A)

24

24

20
18

20

B

C

A

14
A

10

B
C

5
0
-40

0

20

45

60

70

0
Altitude (m) 0
*)
110
AP
*) Atmospheric Pressure

Fig. 21-1: Output current vs. ambient temp.

short term

2000
80

4000
62

5000
54

Fig. 21-2: Output current vs. altitude

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

22. Protection Features
Output overvoltage
protection

typ. 30 Vdc
max. 32 Vdc

In case of an internal power supply defect, a redundantcircuit limits the maximum output voltage to 32 V. The
output switches off and performs three restart attempts. If
the failure continues, the output shuts down. Cycle input
power to reset.

Degree of protection
Penetration protection

IP20> 5 mm

EN/IEC 60529
e.g. screws, small parts

Overtemperature
protection

included

output shut-down with automatic restart

Input transient protection

MOV (Metal Oxide
Varistor)for protection values, see chapter 20 (EMC)

Internal input fuseno internal fuse

For required external input fuses, see chapter 4.

23. Safety Features
Input / output separation

SELV
IEC/UL 61010-2-201
double or reinforced galvanic insulation

Class of protectionI

PE (Protective Earth) connection required

Isolation resistance> 500 MOhmat delivered condition between input and output, measured
with 500 Vdc
at delivered condition between input and PE, measured
with 500 Vdc
at delivered condition between output and PE, measured
with 500 Vdc> 500 MOhm
> 500 MOhm
PE resistance< 0.1 Ohm

resistance between PE terminal and the housing in the areaof the DIN rail mounting bracket

PE conductor current

typ.
typ.

at 3x 380 Vac 50 Hz, TN-, TT-mains
at 3x 500 Vac 50 Hz, TN-, TT-mains

0.56 mA
0.87 mA

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

24. Dielectric Strength
The output voltage is floating and has no ohmic connection to the ground.
Type and factory tests are conducted by the manufacturer. Field tests may be conducted in the field using the appropriate
test equipment which applies the voltage with a slow ramp (2 s up and 2 s down). Connect all input-terminals together
as well as all output poles before conducting the test. When testing, set the cut-off current settings to the value in thetable below.

Type test (60 s)
Factory test (5 s)Field test (5 s)Cut-off current
setting for fieldtest

Fig. 24-1: Dielectric strength

B*)

A
4000 Vac
3600 Vac
2000 Vac> 10 mA

B
6000 Vac
5400 Vac
2000 Vac> 10 mA

C
1000 Vac
500 Vac
500 Vac> 20 mAD
500 Vac
500 Vac
500 Vac> 10 mA

To fulfil the PELV requirements according to EN 60204-1 § 6.4.1, werecommend that either the (+) pole, the (–) pole or any other part ofthe output circuit shall be connected to the protective earth system. This
helps to avoid situations in which a load starts unexpectedly or can not
be switched off when unnoticed earth faults occur.

When testing input to DC-OK ensure that the max. voltage between DC-OK and the output is not exceeded (column D). We recommend
connecting DC-OK pins and the output pins together when performing the test.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

25. Approved, Fulfilled or Tested Standards
IEC 61010

Manufacturer's Declaration
IEC 61010-2-201 - Electrical Equipment for Measurement, Control andLaboratory Use - Particular requirements for control equipment

Semi F47

Test Report
Voltage Sag Immunity for Semiconductor Processing Equipment

26. Regulatory Product Compliance
EU Declaration ofConformity

The CE mark indicates conformance with the European

REACH Regulation

Manufacturer's Declaration
EU Regulation regarding the Registration, Evaluation, Authorisation
and Restriction of Chemicals
EU Regulation 1907 / 2006

WEEE Regulation

Manufacturer's Declaration
EU Directive on Waste Electrical and Electronic Equipment Registered inGermany as business to business (B2B) products.
EU Directive 2012/19/EU
WEEE-Reg.-Nr. DE 55837529

RoHS (China RoHS 2)

Manufacturer's Statement
Administrative Measures for the Restriction of the Use of Hazardous
Substances in Electrical and Electronic Products 25 years

IEC 61558-2-16(Annex BB)– EMC directive– Low-voltage directive (LVD)– RoHS directive

Safety Isolating
Transformer

Test Certificate
IEC 61558-2-16 - Safety of transformers, reactors, power supply units
and similar products for supply voltages up to 1100 V.
Particular requirements and tests for switch mode power supply units
and transformers for switch mode power supply units.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

27. Physical Dimensions and Weight
Width
HeightDepth

79 mm
124 mm
136 mmThe DIN rail depth must be added to the unit depth to calculate the total required
installation depth.

Weight1100 g

DIN rail

Use 35 mm DIN rails according to EN 60715 or EN 50022 with a height of 7.5 or 15 mm.

Housing material

Body: Aluminium alloy
Cover: Zinc-plated steel
40 / 40 / 5 / 5 mm

124

Installation clearances(top / bottom / left / right)

Fig. 27-1: Front view136
DIN rail depth

Fig. 27-2: Side viewAll dimensions in mm unless otherwise noted.

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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TP960.481

28. Deviation List
Serial Numbers: 29134962 to 29134980
This deviation list is intended to describe the differences between the actual engineering sample and the targeted
specifications of the final product, as documented in the data sheet.
Statements below refer to the chapter in the data sheet.
WARNING■■■

Do not operate unattended.
In case of smoke or other fault conditions, switch off the power supply.
The power supply shall be operated by trained electrical personnel only.

02. Installation Instructions
External input protection

Characteristic of actual products
Input fuse is not implemented. Please
follow advice in chapter 4. External
Input Protection

Characteristic of final products
The device is designed, tested andapproved for branch circuits up to 32 A
(IEC) and 30 A (UL) without additional
protection device. If an external fuse
is utilized, do not use circuit breakers
smaller than 16 A B- or C-Characteristic
to avoid a nuisance tripping of thecircuit breaker.

Characteristic of actual products
Quick-connect spring-clamp terminals+ Push-in functionality
Quick-connect spring-clamp terminals+ Push-in functionality

Characteristic of final products
Quick-connect spring-clamp terminals

Characteristic of actual products
HiccupPLUS state is off (for DC < 90 %)Overtemperature protection

Characteristic of final products
Pre-warning for overtemperature
HiccupPLUS mode or overtemperature
protection

Characteristic of actual productsElectrostatic discharge air discharge,
8 kV, Criterion A
Radiated emission EN 55011 and EN
55032, class A

Characteristic of final productsElectrostatic discharge air discharge,
15 kV, Criterion A
Radiated emission EN 55011 and EN
55032, class B

17. Terminals and Wiring
Input Terminals
Output Terminals

Quick-connect spring-clamp terminals

19. Status LED Signaling
Yellow (blinking 1 Hz)
Red (blinking 1 Hz)

20. EMCEMC Immunity
EMC Emission

All parameters are specified at 48 V, 20 A, 3x 500 Vac, +25 °C ambient and after a 5 minutes run-in time unless otherwise noted.
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